# Knowledge Base

## Solution 34673: Graphing Sine, Cosine, and Tangent Functions on the TI-84 Plus C Silver Edition Graphing Calculator.

### How do I graph sine, cosine, and tangent functions using my TI-84 Plus C Silver graphing calculator?

The following examples will demonstrate how to graph sine, cosine and tangent functions using a TI-83 family, TI-84 Plus family, or TI-Nspire handheld in TI-84 Plus mode. Each device has the ability to graph trigonometric function in either degrees or radians. Follow the steps provide below to ensure that the calculator is in either Degree or Radian mode.

Please Note: To graph the example functions correctly, use Radian mode. Radian mode is also recommended when graphing a trigonometric and an algebraic function on the same screen.

1) Press the [MODE] key.
2) Highlight Degree or Radian and press the [ENTER] key.

Example 1: Graph Sin(X)

1) Press the [Y=] key to access the Y= Editor.
2) With the cursor next to Y1, press [SIN] [X,T,q,n] [ )].
3) Press the [GRAPH] key to graph the function.
4) To display a better graph of the sin(x) function, press [ZOOM] and select 7:ZTrig. Example 2: Graph Cos(X)

1) Press the [Y=] key to access the Y= Editor.
2) With the cursor next to Y1, press [COS] [X,T,q,n] [ )].
3) Press the [GRAPH] key to graph the function.
4) To display a better graph of the cos(x) function, press [ZOOM] and select 7:ZTrig. Example 3: Graph Tan (X)

1) Press the [Y=] key to access the Y= Editor.
2) With the cursor next to Y1, press [TAN] [X,T,q,n] [ )].
3) Press the [GRAPH] key to graph the function.
4) To display a better graph of the tan(x) function, press [ZOOM] and select 7:ZTrig. Please see the TI-84 Plus C Silver Edition guidebook for additional information.